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Application of the equivalent multipole moment method with polar translations to forward calculation of neuromagnetic fields
Author(s) -
Hamada Shoji,
Kitano Mitsuhiro,
Kobayashi Tetsuo
Publication year - 2008
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.10079
Subject(s) - multipole expansion , spherical harmonics , dipole , physics , polar , magnetic field , electromagnetic coil , magnetic dipole , mathematical analysis , computational physics , classical mechanics , quantum electrodynamics , mathematics , quantum mechanics
This paper describes an application of the equivalent multipole moment method (EMMM) with polar translations to calculation of magnetic fields induced by a current dipole placed in a human head model. Although the EMMM is a conventional Laplacian field solver based on spherical harmonic functions, the polar translations enable it to treat eccentric and exclusive spheres in arbitrary arrangements. The head model is composed of seven spheres corresponding to skin, two eyeballs, skull, cerebral spinal fluid, gray matter, and white matter. The validity of the calculated magnetic fields and the magnetic flux linkages with a loop coil located near the model is successfully confirmed by the reciprocity theorem derived by Eaton. © 2008 Wiley Periodicals, Inc. Electron Comm Jpn, 91(4): 34–44, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecj.10079